These data were obtained in a comparison of two different methods for determining dissolved oxygen concentration (in milligrams per liter):
Estimate the difference between the methods. Give a confidence interval for the mean difference. What assumptions have you made? Do you think this experiment provides an adequate basis for choosing one method other the other'! In not, what further experiments and data analysis would you recommend? Imagine different outcomes that could result from your analysis and say what each m1ght ·show.